hello
before error
Error: error
    at foo ([WILDCARD]tests/async_error.ts:4:9)
    at eval ([WILDCARD]tests/async_error.ts:7:1)
    at eval (<anonymous>)
    at execute (deno/js/runtime.ts:[WILDCARD])
    at FileModule.compileAndRun (deno/js/runtime.ts:[WILDCARD])
    at denoMain (deno/js/main.ts:[WILDCARD])
    at deno_main.js:1:1